Receding dog.



PATENTED APR. 25, 1905.

A. B. MOGULLOGH.

RECEDING DOG. APPLICATION FILED APR. 7. 1904.

2 SHEETWHEBT 1.

Til/E8229 'PATENTEL' APR. 25, 1905.

A. B. MGGULLOGH- RECEDING DOG.

APPLICATION IILED APR. '1. 1904.

2 SHEETSSHEET 2.'

NITED STATES Patented April 25 1905.

ATENT Fries.

RECEDING DOG.

SPECIFICATION forming part of Letters Patent No. 787,992, dated April25, 1905.

Application filed April 7, 1.904. Serial No. 201,952.

To all IIIIOIIL if m-rl/ concern:

Be it known that I, ARTHUR B. M (:CULLoc n, a citizen of the UnitedStates of America, and a resident of Kapousin, in the county of Pierceand State of Washington, have invented certain new and usefulImprovements in Receding Dogs, of which the following is aspecification.

This invention relates todevices for securing lumber on asawmill-carriage, and has for its objects, first, to provide a dog whichshall recede on the knee to which it is secured, so

that when the log is rolled against it it will not be broken or damaged,and, second, to provide a dog which shall always act vertically downwardin whatever position it may be placed. I attain these objects by thedevices illustrated in the accompanying drawings, in which* Figure 1 isa side view of my device when used to fasten a large log. Fig. 2 is asimilar view when in use to fasten a small piece of lumber, showing thesafety-stop in use. Fig. 3 is front view of my device, a part of theknee being broken away; and Fig. at is the plan thereof.

Similar numerals of reference refer to similar parts throughout theseveral views.

in the drawings l have shown an ordinary knee 1, mounted in the usualway on the headblocks and adapted to press against the side of thelumber 3 being sawed. To the side of the knee 1 l have secured, by meansof countersunk bolts, the guide-plate 4:, extending from the front edgeof the knee to beyond the rear edge thereof. The rear end of this plate1 is secured to the plate 5, which is secured to the rear end of theknee 1. The upper and lower edges of the guideplates at are beveled otl'toward the knee 1, as plainly shown in Fig. 3.

The sliding piece 6 is planed with inwardlybeveled parts 7, whichaccurately fit over and engage the beveled edges of the guide-plate -l.This piece 6 is substantially square and slides horizontally on theguide-plate 4: and carries the dog mechanism. The lug 8 on its loweredge is adapted to engage the stop 9, secured to the knee 1 in suchposition as to prevent the sliding piece 6 from passing beyond the edgeof the knee and the guide-plate a.

The operating-handle 10 is pivoted at 11 to the piece 6 and is providedwith the usual spring-latch 1L, engaging the notches in the quadrant 13,secured to the piece 6.

The link 14: is pivoted to the handle 10 at 15 and extends downwardtherefrom to engage the vertical dog-bar at us.

The piece 6 has a vertical hole passing through it near its center,through which passes the vertical dog-bar 17. This bar 17 has a seriesof holes 18 made at intervals along its length.

The casting 1%) slides on the bar 17 and is held in place by thespring-pin 20, which ongages any one of the holes '18.

The dog 21 is secured to the piece 19 and moves therewith and projectsoutward and downward, so as to engage the lumber on thesawmill-carriage.

To the other side of the guide-plate t and between it and the knee 1 ispivoted the arm 22, the pivot 23 thereof being secured in the plate aand one end having the pin 24: attached to it and passing through a holein the plate 1, so that its end will project therefrom so as to stop thesliding piece (3 at such a point that the dog 21 shall be only about oneinch beyond the edge of the knee, thus allowing my device to be used incutting lumber down to a thickness of about two inches without runningany risk of the dog projecting into the path cut by the saw, and shownin F .2 by the dotted line in the lumber 3. The handle 22 of thissafety-stop 24 extends toward the rear end of the knee and may be of anydesired length.

It is evident that the entire dog-operating mechanism slides with thepiece (5 on the guideplate l and that the bar 17 and the dog 21 alwaysact vertically. Further, if the dog 21 receives a heavy blow from a logbeing rolled against the knee it will cause the piece 6 and the entiredog mechanism to slide back on the plate at, and thus save the dog frombeing broken thereby.

What I claim, and desire to secure by Letl ters Patent, isl 1. In asawmill-dog, the combination With l the knee mounted on the carriage, ofa horizontal guide-plate secured to said knee, a carl rier-block mountedon and freely sliding on 1 said guid e-plate, a vertically-slidingtooth-bar 1 mounted on and sliding With said carrier-block l andcarrying a tooth, a hand-lever pivoted to l and sliding With saidcarrier-block, a link coni necting said hand lever With said verticaltooth-bar, and a quadrant mounted on said carrier-block and adapted tobe engaged by and to hold said hand-lever in any position thereon.

2. In a sawmill-dog, the combination With the knee mounted on thecarriage, of a horizontal guide-plate secured to said knee, acarrier-block mounted on and freely sliding on said guide-plate, a stopmounted on said guidel plate whereby said carrier-block is preventedfrom passing too far forward on said guidel plate, a vertically-slidingtooth-bar mounted on and sliding With said carrier-block and carrying atooth, a hand-lever pivoted to and i sliding With said carrier-block, alink connecting said hand-lever With said vertical toothl bar, and aquadrant mounted on said carrierblock and adapted to be engaged by andto hold said hand-lever in any position thereon.

3. In a sawmill-dog, the combination With the knee mounted on thecarriage, of a hori- Zontal guide-plate secured to said knee, acarrier-block mounted on and freely sliding on said guide-plate, aremovable stop mounted on said guide-plate whereby said carrier-block isprevented from passing'too far forward on said guide-plate, a horizontallever pivoted to said knee and engaging said stop to remove it, avertically-sliding tooth-bar mounted on and sliding With saidcarrier-block and carrying a tooth, a hand-lever pivoted to and slidingWith said carrier-block, a link connecting said hand-lever With saidvertical tooth-bar, and a quadrant mounted on said carrier-block andadapted to be engaged by and to hold said hand-lever in any positionthereon.

Signed at Eatonville, Washington, this 28th day of March, 1904:.

ARTHUR B. MOQULLOCH.

Witnesses:

A. CI-IRISTOFIRSON, Gr. W. FALooNER.

